Add some documentation

src/main/java/app/Main.java

@@ -24,6 +24,7 @@ public class Main extends Application {
 
   /**
    * Boilerplate function to launch the application.
+   * @param args Additional arguments from commandline
    */
   public static void main(String[] args) {
     launch(args);

src/main/java/app/controllers/Controller.java

@@ -3,12 +3,12 @@ package app.controllers;
 import com.google.common.eventbus.EventBus;
 
 /**
- * Interface to make a controller that contains an EventBus
+ * Interface describing a controller that contains an EventBus
  */
 public interface Controller {  
   /**
    * Registers the main EventBus into the controller.
-   * @param eventBus the main EventBus
+   * @param eventBus The EventBus
    */
   public void setEventBus(EventBus eventBus);
 }

src/main/java/app/controllers/EditorController.java

@@ -32,6 +32,9 @@ import app.service.LanguageOperations;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 
+/**
+ * A FXML controller that controls the editor component of the UI
+ */
 public class EditorController implements Initializable, Controller {
 
   @FXML
@@ -73,8 +76,11 @@ public class EditorController implements Initializable, Controller {
   }
 
   /**
-   * Uses Model.language to determine whether the current line/selection is
+   * Uses the {@link app.model.ProgrammingLanguage ProgrammingLanguage} in 
-   * commented or not, and toggles the comment.
+   * {@link app.model.Model Model} to determine whether the current line/selection
+   * is commented or not, and toggles the comment.
+   * 
+   * @see app.model.ProgrammingLanguage#commentLine(String) ProgrammingLanguage.commentLine(line)
    */
   private void toggleComment() {
     if (editor.getSelectedText().equals("")) {
@@ -101,6 +107,10 @@ public class EditorController implements Initializable, Controller {
     }
   }
 
+  /**
+   * Updates the wraptext setting of the code area
+   * @param isWrapText The new value for the setting
+   */
   private void setWrapText(boolean isWrapText) {
     this.editor.setWrapText(isWrapText);
   }
@@ -120,34 +130,33 @@ public class EditorController implements Initializable, Controller {
   }
 
   /**
-   * Refreshes the editor whenever the language is changed.
+   * Updates the content of the editor to a specific filepath
-   * 
+   * @param filePath The path of the file
-   * @param event
+   * @throws FileNotFoundException
    */
-
+  private void setEditorContent(String filePath) {
-  @Subscribe
+    try (Scanner sc = new Scanner(new File(filePath))) {
-  private void handle(FileSelectedEvent event) {
-    try (Scanner sc = new Scanner(new File(event.getPath()))) {
       editor.clear();
       while (sc.hasNextLine()) {
         editor.appendText(sc.nextLine());
         editor.appendText("\n");
       }
     } catch (FileNotFoundException ex) {
-      System.out.println(event.getPath());
+      // TODO: add better error handling and user feedback
+      System.err.println(filePath);
     }
   }
 
+  @Subscribe
+  private void handle(FileSelectedEvent event) {
+    this.setEditorContent(event.getPath());
+  }
+
   @Subscribe
   private void handle(LanguageChangedEvent event) {
     this.refreshHighlighting();
   }
 
-  /**
-   * Toggles a language specific comment of the line/selection
-   * 
-   * @param event
-   */
   @Subscribe
   private void handle(ToggleCommentEvent event) {
     this.toggleComment();

src/main/java/app/controllers/FiletreeController.java

@@ -22,6 +22,9 @@ import app.events.OpenProjectEvent;
 import app.model.Model;
 import javafx.fxml.Initializable;
 
+/**
+ * A FXML controller that controls the filetree component of the UI
+ */
 public class FiletreeController implements Initializable, Controller {
 
   private EventBus eventBus;
@@ -32,13 +35,12 @@ public class FiletreeController implements Initializable, Controller {
   Image java = new Image(getClass().getResourceAsStream("/graphics/java.png"));
   Image placeholder = new Image(getClass().getResourceAsStream("/graphics/placeholder.png"));
 
-  // Creating the variable.
   @FXML
   private TreeView<String> filetree;
 
   @Override
   public void initialize(URL url, ResourceBundle resourceBundle) {
-    //
+    // TODO: Implement
   }
 
   @Override
@@ -108,7 +110,7 @@ public class FiletreeController implements Initializable, Controller {
 
   /**
    * A help function to check if the extensions match .java or .md to insert the
-   * spesific icons and sending it to another help funtion createExtension to
+   * specific icons and sending it to another help funtion createExtension to
    * create the new CheckboxTreeItem<String> that will add to the parent.
    */
   private void checkExtensions(File file, CheckBoxTreeItem<String> parent) {

src/main/java/app/controllers/MenubarController.java

@@ -32,6 +32,9 @@ import javafx.stage.DirectoryChooser;
 import javafx.stage.FileChooser;
 import javafx.stage.Stage;
 
+/**
+ * A FXML controller that controls the filetree component of the UI
+ */
 public class MenubarController implements Initializable, Controller {
 
   private EventBus eventBus;
@@ -57,6 +60,9 @@ public class MenubarController implements Initializable, Controller {
   /* FILE */
   /* ------------------------------------------------------------------------ */
 
+  /**
+   * Handles whenever the Open File button is pressed in the menubar
+   */
   @FXML
   public void handleOpenFile() {
     FileChooser fc = new FileChooser();
@@ -70,6 +76,9 @@ public class MenubarController implements Initializable, Controller {
     this.eventBus.post(new FileSelectedEvent(correctFormat));
   }
 
+  /**
+   * Handles whenever the Open Project button is pressed in the menubar
+   */
   @FXML
   private void handleOpenProject() {
     DirectoryChooser dc = new DirectoryChooser();
@@ -84,45 +93,33 @@ public class MenubarController implements Initializable, Controller {
 
   }
 
-  // @FXML
-  // public void handleSaveFile() {
-  // FileChooser fc = new FileChooser();
-  // fc.setTitle("Save File");
-  // Stage stage = (Stage) menubar.getScene().getWindow();
-
-  // FileChooser.ExtensionFilter extentionjava = new
-  // FileChooser.ExtensionFilter(".java");
-  // FileChooser.ExtensionFilter extentionmd = new
-  // FileChooser.ExtensionFilter(".md");
-  // fc.getExtensionFilters().addAll(extentionjava, extentionmd);
-  // fc.showOpenDialog(stage);
-  // }
-
   /**
-   * Handles the event where the language was change from the menu.
+   * Handles whenever the programming language is changed from the menubar.
-   * 
-   * @param event
    */
   @FXML
   private void handleLanguageChange(ActionEvent event) {
     this.eventBus.post(new LanguageChangedEvent(((RadioMenuItem) event.getSource()).getText()));
   }
 
+  /**
+   * Handles whenever the wraptext togglebutton is pressed in the menubar
+   */
   @FXML
   private void handleToggleWraptext(ActionEvent event) {
     var isSelected = ((CheckMenuItem) event.getSource()).selectedProperty().get();
     this.eventBus.post(new ToggleWrapTextEvent(isSelected));
   }
 
+  /**
+   * Handles whenever the theme is changed from the menubar
+   */
   @FXML
   private void handleThemeChange(ActionEvent event) {
     this.eventBus.post(new ThemeChangedEvent(((RadioMenuItem) event.getSource()).getText()));
   }
 
   /**
-   * Handles the event where there was an exit request from the menu.
+   * Handles whenever the exit button is pressed in the menubar
-   * 
-   * @param event
    */
   @FXML
   private void handleExitApplication(ActionEvent event) {
@@ -133,31 +130,49 @@ public class MenubarController implements Initializable, Controller {
   /* EDIT */
   /* ------------------------------------------------------------------------ */
 
+  /**
+   * Handles whenever the undo button is pressed in the menubar
+   */
   @FXML
   private void handleUndo(ActionEvent event) {
     this.eventBus.post(new UndoEvent());
   }
 
+  /**
+   * Handles whenever the redo button is pressed in the menubar
+   */
   @FXML
   private void handleRedo(ActionEvent event) {
     this.eventBus.post(new RedoEvent());
   }
 
+  /**
+   * Handles whenever the copy button is pressed in the menubar
+   */
   @FXML
   private void handleCopy(ActionEvent event) {
     this.eventBus.post(new CopyEvent());
   }
 
+  /**
+   * Handles whenever the cut button is pressed in the menubar
+   */
   @FXML
   private void handleCut(ActionEvent event) {
     this.eventBus.post(new CutEvent());
   }
 
+  /**
+   * Handles whenever the paste button is pressed in the menubar
+   */
   @FXML
   private void handlePaste(ActionEvent event) {
     this.eventBus.post(new PasteEvent());
   }
 
+  /**
+   * Handles whenever the Toggle Comment button is pressed in the menubar
+   */
   @FXML
   private void handleToggleComment(ActionEvent event) {
     this.eventBus.post(new ToggleCommentEvent());
@@ -167,6 +182,9 @@ public class MenubarController implements Initializable, Controller {
   /* ABOUT */
   /* ------------------------------------------------------------------------ */
 
+  /**
+   * Handles whenever the About button is pressed in the menubar
+   */
   @FXML
   private void handleAbout(ActionEvent event) {
     String aboutLink = "https://gitlab.stud.idi.ntnu.no/oysteikt/tdt4100-project-2021v/-/blob/master/README.md";
@@ -179,8 +197,6 @@ public class MenubarController implements Initializable, Controller {
 
   /**
    * Updates menubuttons whenever the language is changed
-   * 
-   * @param event
    */
   @Subscribe
   private void handle(LanguageChangedEvent event) {

src/main/java/app/controllers/ModelineController.java

@@ -13,6 +13,9 @@ import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
 import javafx.scene.control.Label;
 
+/**
+ * A FXML controller that controls the modeline component of the UI
+ */
 public class ModelineController implements Initializable, Controller {
   
   @FXML
@@ -49,7 +52,6 @@ public class ModelineController implements Initializable, Controller {
   /**
    * Updates the column-row number display whenever the editor cursor
    * changes position.
-   * @param event
    */
   @Subscribe
   private void handle(EditorChangedEvent event) {
@@ -58,7 +60,6 @@ public class ModelineController implements Initializable, Controller {
 
   /**
    * Updates the saveState label whenever the file either is saved or modified
-   * @param event
    */
   @Subscribe
   private void handle(FileSaveStateChangedEvent event) {
@@ -70,7 +71,6 @@ public class ModelineController implements Initializable, Controller {
   /**
    * Updates the modeline to display a new language
    * whenever it is changed.
-   * @param event
    */
   @Subscribe
   private void handle(LanguageChangedEvent event) {

src/main/java/app/model/ProgrammingLanguage.java

@@ -4,6 +4,11 @@ import java.net.URL;
 import java.util.Map;
 import java.util.regex.Pattern;
 
+/**
+ * An interface describing functions required for a class to
+ * provide language specific details and functionality to the 
+ * editor
+ */
 public interface ProgrammingLanguage {
   /**
    * The name of the programming language
@@ -26,12 +31,44 @@ public interface ProgrammingLanguage {
    */
   public Pattern getPattern();
 
+  /**
+   * Comment out a line
+   * @param line The text of the line to comment out
+   * @return The commented line
+   */
   public String commentLine(String line);
+
+  /**
+   * Uncomment a line
+   * @param line The text of the line to uncomment
+   * @return The uncommented line
+   */
   public String unCommentLine(String line);
+
+  /**
+   * Whether or not a line is commented
+   * @param line The text of the line
+   */
   public boolean isCommentedLine(String line);
 
+  /**
+   * Comment out an area of text
+   * @param selection The text of the area to comment out
+   * @return The commented area
+   */
   public String commentSelection(String selection);
+
+  /**
+   * Uncomment a line
+   * @param selection The text of the line to uncomment
+   * @return The uncommented area
+   */
   public String unCommentSelection(String selection);
+
+  /**
+   * Whether or not an area of text is commented
+   * @param selection The content of the area
+   */
   public boolean isCommentedSelection(String selection);
 
 }

src/main/java/app/service/LanguageOperations.java

@@ -9,6 +9,10 @@ import org.fxmisc.richtext.model.StyleSpansBuilder;
 
 import app.model.ProgrammingLanguage;
 
+/**
+ * Common static operations that can be executed on any class
+ * that implements {@link app.model.ProgrammingLanguage ProgrammingLanguage}
+ */
 public class LanguageOperations {
   
   /**